Guhring 9039320048260 Spiral Flute Tap 10-32 Unf

Product Description

The GUHRING 9039320048260 is a spiral flute tap designed for cutting internal 10-32 UNF threads in blind holes. Built from cobalt high-speed steel with a bright, uncoated finish, it delivers reliable performance in aluminum and aluminum alloy workpieces where heat resistance and edge toughness matter. The modified bottoming chamfer allows threading close to the bottom of a blind hole. With a 45-degree helix angle and a fast flute style, chips are efficiently evacuated upward and out of the hole during the tapping operation. This tap is suited for machine tapping applications in precision manufacturing, maintenance, and repair environments where consistent thread quality in a 2B class of fit is required.

This tap is intended for blind hole threading in aluminum and aluminum alloy materials. The 2B class of fit makes it appropriate for standard fastener assemblies requiring a free-running thread engagement. The modified bottoming chamfer provides only a short lead-in, allowing usable threads to be cut very close to the bottom of a blind hole — a critical requirement in shallow or tightly toleranced workpieces. The right-hand flute and right-hand thread configuration are standard for conventional machine tapping setups.

Key Features

• Modified bottoming chamfer for threading close to the bottom of blind holes
• 45-degree helix angle with fast flute style for efficient upward chip evacuation
• Cobalt construction for improved heat resistance and edge durability over standard HSS
• Bright, uncoated finish suited to aluminum and aluminum alloy applications
• 2B class of fit for standard free-running thread assemblies
• H3 and H4 thread limit range for consistent pitch diameter control

Compatibility

Designed for blind hole threading in aluminum and aluminum alloy materials, producing 10-32 UNF right-hand internal threads with a 2B class of fit. Compatible with standard machine tapping chucks and holders sized for a 0.194-inch shank diameter.

Installation Notes

Installation should be performed by a machinist or maintenance technician using a tapping machine, CNC machining center, or tapping head capable of maintaining proper axial alignment. Secure the tap in a holder appropriate for the 0.194-inch shank and confirm the spindle speed is set for the material and tap diameter before cutting. Always ensure the workpiece is securely fixtured before beginning the operation. Coolant-through is not supported on this tap, so apply cutting fluid externally when required by the operation.